Buggy code:
public static boolean useAdvanced ( ) { } public static boolean useDoubleTap ( ) { } public static boolean useScrolling ( ) { } public static boolean useExactScrolling ( ) { } public static boolean forceParallax ( ) { } public static boolean useDrag ( ) { } public static boolean reverseDrag ( ) { } public static boolean useScale ( ) { } public static boolean extendScale ( ) { } public static boolean useLongPressReset ( ) { } public static boolean useToast ( ) { } public static String getImagePrefix ( ) { } public static void setImagePrefix ( String prefix ) { } public static int getHistorySize ( ) { } public static boolean useHighResolutionNotificationIcon ( ) { } public static int getNumberSources ( ) { } public static void setSources ( List < Source > listData ) { } public static List < Source > getSources ( ) { } public static Source getSource ( int index ) { } public static int getNumSources ( ) { } public static String getSourceDataPrefix ( String type ) { } public static String getSourceDataHint ( String type ) { } public static String getSourceDataSuffix ( String type ) { } public static int getSourceNum ( int index ) { } public static boolean useSourcePreview ( int index ) { } public static String getSourceType ( int index ) { } public static boolean useSource ( int index ) { } public static String getSourceTitle ( int index ) { } public static String getSourceData ( int index ) { } public static boolean useSourceTime ( int index ) { } public static String getSourceTime ( int index ) { } public static boolean useImageHistory ( ) { } public static int getImageHistorySize ( ) { } public static boolean cacheThumbnails ( ) { } public static int getThumbnailSize ( ) { } public static HashSet < String > getUsedLinks ( ) { } public static void setUsedLinks ( Set < String > usedLinks ) { } public static void addUsedLink ( String link , long time ) { } public static void clearUsedLinks ( ) { } public static void checkUsedLinksSize ( ) { } public static int getNotificationColor ( ) { } public static void setNotificationColor ( int color ) { } public static String getNotificationTitle ( ) { } public static void setNotificationTitle ( String title ) { } public static int getNotificationTitleColor ( ) { } public static void setNotificationTitleColor ( int color ) { } public static int getNotificationIcon ( ) { } public static void setNotificationIcon ( int drawable ) { } public static void setUseNotificationIconFile ( boolean value ) { } public static boolean useNotificationIconFile ( ) { } public static String getNotificationIconFile ( ) { } public static void setNotificationIconFile ( String filePath ) { } public static String getNotificationIconAction ( ) { } public static void setNotificationIconAction ( String action ) { } public static int getNotificationIconActionDrawable ( ) { } public static void setNotificationIconActionDrawable ( int drawable ) { } public static String getNotificationSummary ( ) { } public static void setNotificationSummary ( String summary ) { } public static int getNotificationSummaryColor ( ) { } public static void setNotificationSummaryColor ( int color ) { } public static void setNotificationOptionTitle ( int position , String title ) { } public static String getNotificationOptionTitle ( int position ) { } public static void setNotificationOptionDrawable ( int position , int drawable ) { } public static int getNotificationOptionDrawable ( int position ) { } public static void setNotificationOptionColor ( int position , int color ) { } public static int getNotificationOptionColor ( int position ) { } public static int getNotificationOptionPreviousColor ( ) { } public static void setUseNotificationGame ( boolean use ) { } public static boolean useNotificationGame ( ) { } public static boolean useEffects ( ) { } public static boolean useToastEffects ( ) { } public static boolean useRandomEffects ( ) { } public static String getRandomEffect ( ) { <START_BUG> return AppSettings . prefs . getString ( "random_effect" , null ) ; <END_BUG> } public static void setRandomEffect ( String value ) { } public static boolean useDuotoneGray ( ) { } public static void setDuotoneColor ( int num , int color ) { } public static int getDuotoneColor ( int num ) { } public static void setEffect ( String key , int value ) { } public static int getEffectValue ( String key ) { } public static float getEffectsFrequency ( ) { } public static float getRandomEffectsFrequency ( ) { } public static boolean useEffectsOverride ( ) { } public static void setBlurRadius ( int radius ) { } public static int getBlurRadius ( ) { } public static float getAutoFixEffect ( ) { } public static float getBrightnessEffect ( ) { } public static float getContrastEffect ( ) { } public static boolean getCrossProcessEffect ( ) { } public static boolean getDocumentaryEffect ( ) { } public static boolean getDuotoneEffect ( ) { } public static float getFillLightEffect ( ) { } public static float getFisheyeEffect ( ) { } public static float getGrainEffect ( ) { } public static boolean getGrayscaleEffect ( ) { } public static boolean getLomoishEffect ( ) { } public static boolean getNegativeEffect ( ) { } public static boolean getPosterizeEffect ( ) { } public static float getSaturateEffect ( ) { } public static boolean getSepiaEffect ( ) { } public static float getSharpenEffect ( ) { } public static float getTemperatureEffect ( ) { } public static float getVignetteEffect ( ) { } public static boolean useGoogleAccount ( ) { } public static void setUseGoogleAccount ( boolean use ) { } public static String getGoogleAccountName ( ) { } public static void setGoogleAccountName ( String name ) { } public static String getGoogleAccountToken ( ) { } public static void setGoogleAccountToken ( String token ) { }

Fix:
return AppSettings . prefs . getString ( "random_effect" , "None" ) ;